CN109212825A - Optical diaphragm and display module - Google Patents
Optical diaphragm and display module Download PDFInfo
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- CN109212825A CN109212825A CN201811326205.3A CN201811326205A CN109212825A CN 109212825 A CN109212825 A CN 109212825A CN 201811326205 A CN201811326205 A CN 201811326205A CN 109212825 A CN109212825 A CN 109212825A
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- refractive index
- light guide
- recess portion
- light
- waveguide layer
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
- G02F1/133504—Diffusing, scattering, diffracting elements
-
- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
- G02F1/133524—Light-guides, e.g. fibre-optic bundles, louvered or jalousie light-guides
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B5/00—Optical elements other than lenses
- G02B5/003—Light absorbing elements
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B5/00—Optical elements other than lenses
- G02B5/02—Diffusing elements; Afocal elements
- G02B5/0205—Diffusing elements; Afocal elements characterised by the diffusing properties
- G02B5/021—Diffusing elements; Afocal elements characterised by the diffusing properties the diffusion taking place at the element's surface, e.g. by means of surface roughening or microprismatic structures
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B5/00—Optical elements other than lenses
- G02B5/02—Diffusing elements; Afocal elements
- G02B5/0273—Diffusing elements; Afocal elements characterized by the use
- G02B5/0278—Diffusing elements; Afocal elements characterized by the use used in transmission
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
- G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
-
- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Nonlinear Science (AREA)
- Mathematical Physics (AREA)
- Chemical & Material Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Optical Elements Other Than Lenses (AREA)
- Devices For Indicating Variable Information By Combining Individual Elements (AREA)
- Mechanical Light Control Or Optical Switches (AREA)
Abstract
The present invention provides a kind of optical diaphragm and display module.Optical diaphragm includes the first optical waveguide layer, the second optical waveguide layer and an at least extinction part.First optical waveguide layer has the first incidence surface, the first light-emitting surface and the accommodating recess portion for being formed in the first incidence surface.Second optical waveguide layer is set to the first incidence surface, has the second incidence surface, the second light-emitting surface and the light guide for being formed in the second light-emitting surface.Each light guide is respectively arranged at each accommodating recess portion, and each light guide has top, bottom and the side for connecting top and bottom.Towards the inner wall of accommodating recess portion, the bottom of light guide corresponds to the recess portion opening of accommodating recess portion for the side of light guide.Extinction part covers side.First optical waveguide layer has a first refractive index, and the second optical waveguide layer has one second refractive index less than first refractive index.
Description
Technical field
The present invention relates to a kind of optical diaphragm and display module more particularly to a kind of optical diaphragms for increasing light shooting angle
And display module.
Background technique
In existing liquid crystal display, when liquid crystal molecule in dark-state perpendicular light source arrange when, liquid crystal molecule it is birefringent
Property may make the light of larger incidence angle pass through and be emitted screen, and display is caused to generate light leakage at big visual angle.
In view of the above-mentioned problems, providing a kind of technical solution in the prior art, it is arranged in liquid crystal layer light-emitting surface a kind of with light
The optical diaphragm layer of lens arrangement is learned, wherein optical lens structure has the refractive index low compared with optical diaphragm layer, can increase incidence
The shooting angle of light, with diverging incident beam.However, there are disadvantages for the optical lens in above-mentioned technical proposal.For example, working as light
It is incident from the side of optical lens with biggish incidence angle, due to being from higher lower Jie of medium incident refractive index of refractive index
Matter, thus incidence angle be more than a critical value when light can be totally reflected in the side of lens arrangement, and make reflection light towards show
Show that the positive apparent direction of device projects, and then reduces the contrast of positive apparent direction.
Summary of the invention
Hold above-mentioned, one of them purpose of the present invention is, provides a kind of optical diaphragm and aobvious in view of the deficiencies of the prior art
Show module, the structure of diverging incident beam can be made to promote the contrast of positive apparent direction.
One of them technical solution provided by the embodiment of the present invention is to provide a kind of optical diaphragm, is used for display module.
Optical diaphragm includes optical waveguide layer, at least a light guide and an at least extinction part.Optical waveguide layer has incidence surface, opposite to each other in incidence surface
Light-emitting surface and be formed at least one accommodating recess portion of incidence surface, wherein there is accommodating recess portion inner wall and recess portion to be open.
Each light guide is respectively arranged at each accommodating recess portion, and each light guide have a top, the bottom far from top and
Connect the side of top and bottom.Towards the inner wall of accommodating recess portion, the bottom of light guide corresponds to accommodating for the side of light guide
The recess portion of recess portion is open.At least an extinction part is set between the side and optical waveguide layer of an at least light guide, and extinction part covers
Side.Optical waveguide layer has a fourth refractive index, and each light guide has one the 5th refractive index, and fourth refractive index is greater than the 5th refraction
Rate.
An other technical solution provided by the embodiment of the present invention is to provide a kind of display module, it includes display panel and
Optical diaphragm as described above.Display panel has a display surface, and optical diaphragm is set to display surface, and incidence surface direction display
Face.
An other technical solution provided by the embodiment of the present invention is to provide a kind of optical diaphragm, is used for a display module.
Optical diaphragm includes the first optical waveguide layer, the second optical waveguide layer and an at least extinction part.First optical waveguide layer has the first incidence surface, phase
Carry on the back in the first incidence surface the first light-emitting surface and be formed in the first incidence surface at least one accommodating recess portion, wherein accommodating recess portion
It is open with inner wall and recess portion.Second optical waveguide layer is set to the first incidence surface, and the second optical waveguide layer has the second incidence surface, phase
Carry on the back in the second incidence surface the second light-emitting surface and be formed in at least light guide of the second light-emitting surface, each light guide is set respectively
It is placed in each accommodating recess portion, and each light guide has top, the bottom far from top and the side for connecting top and bottom.
Towards the inner wall of accommodating recess portion, the bottom of light guide corresponds to the recess portion opening of accommodating recess portion for the side of light guide.At least one
Extinction part is set between at least side of a light guide and the first optical waveguide layer, and extinction part covers side.Wherein, first is guide-lighting
Layer has a first refractive index, and the second optical waveguide layer has one second refractive index, and first refractive index is greater than the second refractive index.
An other technical solution provided by the embodiment of the present invention is to provide a kind of display module, it includes display panel and
Optical diaphragm as described above.Display panel has a display surface, and optical diaphragm is set to display surface, and the second incidence surface direction
Display surface.
Below in conjunction with the drawings and specific embodiments, the present invention will be described in detail, but not as a limitation of the invention.
Detailed description of the invention
Fig. 1 shows the stereoscopic schematic diagram of the display module of first embodiment of the invention；
Fig. 2 shows the enlarged diagram of the optical diaphragm of first embodiment of the invention；
Fig. 3 shows the partial enlarged view of Fig. 2；
Fig. 4 shows the optical diaphragm of Fig. 3 and removes contrast of the optical diaphragm of extinction part under different perspectives；
Fig. 5 shows the enlarged diagram of the alternate embodiment of the optical diaphragm of first embodiment of the invention；
Fig. 6 shows the optical diaphragm of Fig. 5 and removes contrast of the optical diaphragm of extinction part under different perspectives；
Fig. 7 shows the enlarged diagram of another alternate embodiment of the optical diaphragm of first embodiment of the invention；
Fig. 8 shows the optical diaphragm of Fig. 7 and removes contrast of the optical diaphragm of extinction part under different perspectives；
Fig. 9 shows the enlarged diagram of another alternate embodiment of the optical diaphragm of first embodiment of the invention；
Figure 10 shows the optical diaphragm of Fig. 9 and removes contrast of the optical diaphragm of extinction part under different perspectives；
Figure 11 shows the enlarged diagram of another alternate embodiment of the optical diaphragm of first embodiment of the invention；
Figure 12 shows the optical diaphragm of Figure 11 and removes contrast of the optical diaphragm of extinction part under different perspectives；
Figure 13 shows the enlarged diagram of another alternate embodiment of the optical diaphragm of first embodiment of the invention；
Figure 14 shows the optical diaphragm of Figure 13 and removes contrast of the optical diaphragm of extinction part under different perspectives；
Figure 15 shows the partial enlargement diagram of the optical diaphragm of first embodiment of the invention；
Figure 16 shows the enlarged diagram of the optical diaphragm of second embodiment of the invention.
Wherein, appended drawing reference
Display module Z display panel D
Display surface S
Optical diaphragm U, the first optical waveguide layer 1
U’
Optical waveguide layer 1 '
First incidence surface 101
Incidence surface 101 '
Bonding pad 101a, 101a '
First light-emitting surface 102
Light-emitting surface 102 '
Accommodate recess portion 103,103'
Inner wall 1031,1031 '
Recess portion opening 1032,1032 '
Second optical waveguide layer 2
Second incidence surface 201
Second light-emitting surface 202
Light guide 21,21 '
Top 211,211 '
Bottom 212,212 '
Side 213,213 '
Extinction part 3,3 '
Light guide height H
Light guide thickness T
Light L
Incidence angle θ 2
Light guide axial direction Y
Positive apparent direction X
Tangent line C
Specific embodiment
Below by way of particular specific embodiment and Fig. 1 to Figure 16 is cooperated to illustrate optical diaphragm disclosed in this invention and show
Show the embodiment of module, those skilled in the art can understand advantages of the present invention and effect by content disclosed in this specification
Fruit.However, the protection scope that content as disclosed below is not intended to limit the invention, is not departing from present inventive concept spirit
Under principle, those skilled in the art can realize the present invention from application based on different viewpoints with other different embodiments.In addition, needing thing
It first states, attached drawing of the invention is only schematically illustrate, not according to the description of actual size.Though in addition, may make herein
Various elements are described with the first, second, third, etc. term, but those elements should not be limited by those terms.These terms
Mainly to distinguish element.
First embodiment
Each embodiment of diagram is cooperated to illustrate optical diaphragm U and display module Z provided by the present invention below.Firstly, asking
Refering to fig. 1, the present embodiment provides a kind of display module Z and applied to the optical diaphragm U of display module Z.Display module Z has
Display panel D and optical diaphragm U, wherein optical diaphragm U is to be arranged on the display surface S of display panel D.Display module Z
Preferably LCD MODULE, however, the invention is not limited thereto.
Fig. 2 shows the optical diaphragm U in Fig. 1 along the diagrammatic cross-section of hatching line A-A.As shown in Fig. 2, optical diaphragm U includes
First optical waveguide layer 1, the second optical waveguide layer 2 and extinction part 3.First optical waveguide layer 1 enters with the first incidence surface 101, opposite to each other in first
First light-emitting surface 102 of smooth surface 101 and the accommodating recess portion 103 for being formed in the first incidence surface 101.Second optical waveguide layer 2 is set to
First incidence surface 101, and there is the second incidence surface 201, opposite to each other in the second light-emitting surface 202 of the second incidence surface 201 and formation
In the light guide 21 of the second light-emitting surface 202.It should be noted that Fig. 2 is the enlarged diagram of optical diaphragm U, wherein being only painted
Two light guides 21 are with for example, in practical application, the quantity of the unlimited light guide 21 processed of the present invention.
Please refer to Fig. 2 and Fig. 3, wherein Fig. 3 is the partial enlargement diagram of Fig. 2.Specifically, recess portion 103 is accommodated
With inner wall 1031 and recess portion opening 1032；Light guide 21 has top 211, bottom 212 and connection top 211 and bottom
212 side 213, and each light guide 21 with side 213 towards inner wall 1031, bottom 212 corresponding recess opening 1032
Mode is respectively arranged at each accommodating recess portion 103.Particularly, in the present embodiment, the section of light guide 21 is trapezoidal, side
213 tilt toward axial direction Y, and 1031 shape of inner wall substantially cooperates light guide 21, and inner wall 1031 is tilted towards light guide
21 axial direction Y.Light guide 21 can rule or irregular distribution of shapes seen in the second light-emitting surface 202, and from top visual angle
It, light guide 21 can be distributed for spot distribution or strip.Extinction part 3 is set to side 213 and the first optical waveguide layer 1 of light guide 21
Between, and cover the side 213 of light guide 21.
In the structure of Fig. 2 and Fig. 3, the first optical waveguide layer 1 has first refractive index, and the second optical waveguide layer 2 has the second refractive index,
And first refractive index is greater than the second refractive index.As shown in the light L direction of travel in Fig. 2, it is greater than by above-mentioned first refractive index
Second refractive index, the light L for entering light guide 21 from the second incidence surface 201 can deviate the axial direction Y of light guide 21 and reflect,
With diffusion into the light emitted line L.Furthermore, it is understood that extinction part 3 is formed by an extinction material, it can absorb from side 213 and enters leaded light
The light L of part can avoid light L in the generation total reflection of side 213 and towards just as shown in the light L direction of travel in Fig. 3 whereby
Apparent direction X refraction.In the present embodiment, extinction part 3 has third reflect rate, and third reflect rate is equal to first refractive index, whereby,
It can avoid light L to occur to reflect towards positive apparent direction X because of the difference of refractive index in the intersection of the first optical waveguide layer 1 and extinction part 3
Total reflection.Extinction part 3 can be for example formed on light guide 21 with deposition or exposure development processing procedure；However, the present invention not with
This is limited.
See Fig. 4, shows the optical diaphragm U of the present embodiment and remove the optical diaphragm U of extinction part 3 under different perspectives
Contrast, wherein the optical diaphragm U of the present embodiment is indicated with solid line；The data of the optical diaphragm U of extinction part 3 are removed with void
Line indicates.In Fig. 4, for view angle theta with angle (degree) for unit, contrast (Contrast Ratio, CR) is display module Z aobvious
Respective brightness contrast value when being shown as black, white.As shown, the peak value of solid line is 2524, the peak value of dotted line is 2146, indicates to lead
21 side 213 of light part is provided with the optical diaphragm U of extinction part 3 when view angle theta is zero degree, with the optical diaphragm U for removing extinction part 3
Contrast is faced compared to higher.Particularly, above-mentioned " facing contrast " means display module Z when view angle theta is zero degree
Respective brightness contrast when being shown as black, white.
It should be noted that third reflect rate is equal with first refractive index in the present embodiment；However, the present invention is not limited to
This.In an alternate embodiment of the invention, third reflect rate preferably may be greater than the second refractive index and be less than first refractive index
In the range of any value.Particularly, when the refractive index of extinction part 3 is less than or equal to the second refractive index, then light is led from first
When light part 21 enters extinction part 3, total reflection is occurred into for some light and is reflected toward positive apparent direction X, and then reduced and face pair
Degree of ratio.In addition, when the refractive index of extinction part 3 is less than or equal to the second refractive index, light L enters first from the top of extinction part 3
When optical waveguide layer 1, light can be reflected toward positive apparent direction X, thus generate the minus effect that contrast is faced in reduction.On the other hand, if inhaling
The refractive index of light part 3 is greater than first refractive index, then light is easy that multiple reflections occur and shoot to positive apparent direction X in extinction part 3,
Or it is reduced when light enters the first optical waveguide layer 1 from extinction part 3 because being reflected toward positive apparent direction X and faces contrast.Therefore, exist
In present pre-ferred embodiments, third reflect rate is greater than the second refractive index and is less than or equal to first refractive index, in this way, extinction part
3 can effectively absorb from side 213 and return the light faced, and further improving optical diaphragm U's faces contrast.
Referring to Fig. 5, it shows the optical diaphragm U of an alternate embodiment of the invention.In this alternate embodiment, extinction part
3 are further disposed at the bonding pad 101a on the first incidence surface 101 between two accommodating recess portions 103.Particularly, see Fig. 5, even
Area 101a is met between two adjacent recess portion openings 1032, and extinction part 3 extends and the company of being covered in from 21 side 213 of light guide
It connects on area 101a, and keeps bonding pad 101a adjacent with the second light-emitting surface 202 across extinction part 3.From upward angle of visibility degree, at dotted
Or the second light-emitting surface 202 between the light guide 21 and light guide 21 of strip distribution can be considered and all be covered by extinction part 3.In this change
Change in embodiment, is also provided with extinction part 3 by bonding pad 101a, compares previous embodiment, further can absorb to be incident on and lead
The light of 202 junction of light part 21 and the second light-emitting surface, further improving optical diaphragm U's faces contrast.
Fig. 6 is shown the optical diaphragm U (being indicated with solid line) of Fig. 5 and removes the optical diaphragm U (being represented by dotted lines) of extinction part 3
Contrast under different perspectives.In Fig. 6, view angle theta with angle (degree) be unit, contrast (Contrast Ratio,
It CR) is respective brightness contrast value when display module Z is shown as black, white.It will be appreciated from fig. 6 that the peak value of solid line is 2556, dotted line
Peak value is 2146, indicates have the optical diaphragm U of extinction part 3 compared with the optical diaphragm U for removing extinction part 3 in the present embodiment,
It is with higher to face contrast.
Please refer to Fig. 7 and Fig. 8.The shape of the unlimited light guide 21 processed of the present invention, in the alternate embodiment of such as Fig. 7,
The section of light guide 21 can be triangle.Specifically, seeing it from top visual angle, light guide 21 can be strip distribution or dotted point
Cloth, and in the case where spot distribution, the light guide 21 of the present embodiment can be cone or quadrangle cone, the present invention is not limited to
This.And as shown in figure 8, the optical diaphragm U with extinction part 3 (indicates) that contrast C R is when zero degree is in visual angle using solid line
1595, compared to the optical diaphragm U (being represented by dotted lines) for removing extinction part 3, when visual angle is zero degree, peak value is 1167, is indicated
Optical diaphragm U with extinction part 3 is more with higher than the optical diaphragm U for removing extinction part 3 to face contrast.
In another alternate embodiment of the present invention, the section of the light guide 21 of optical diaphragm U can be the column with concave side
Shape shape, and it is seen from top visual angle, light guide 21 can be distributed for strip or spot distribution, as shown in Figure 9.As shown in Figure 10,
In this alternate embodiment, the optical diaphragm U (being indicated with solid line) with extinction part 3 is compared to the optical diaphragm U for removing extinction part 3
(being represented by dotted lines), it is with higher to face contrast.In addition, please refer to Fig. 4 and Figure 10, compared to trapezoidal in Fig. 2
Light guide 21, the columnar shape light guide 21 with concave side of this alternate embodiment, which can reach higher contrast of facing, (schemes
It is that contrast is faced shown in 2828, Fig. 4 as 2524) that contrast is faced shown in 10.This is because the columnar shape with concave side
21 meeting of light guide so as to inject path of the light of side 213 in extinction part 3 longer, and can more effectively be promoted and be faced pair
Degree of ratio.
In the other alternate embodiment of the present invention, the light guide 21 of optical diaphragm U can be two kinds of differences from the side
The trapezoidal combination on slope inclined-plane, wherein closer second light-emitting surface 202 in the lesser inclined-plane of slope, as shown in figure 11.For example,
It is seen from top visual angle, light guide 21 can be strip distribution or spot distribution, and in the case where spot distribution, from three-dimensional viewpoin
From the point of view of light guide 21 can be truncated cones or truncated tetrahedron, the present invention limits not to this.Figure 12 shows the optics of Figure 11
Diaphragm U and the optical diaphragm U for removing extinction part 3 face contrast in different perspectives.Please refer to Fig. 4 and Figure 12, compare
In trapezoidal light guide 21, the light guide 21 of this alternate embodiment can be promoted preferably and be faced pair because with more inclined-plane area
Than degree, (it is that contrast is faced shown in 2822, Fig. 4 as 2524) that contrast is faced shown in Figure 12.
In the other alternate embodiment of the present invention, light guide 21 can also be as shown in figure 13, from the side for trapezoidal
The shape of concave surface is formed on inclined-plane.Alternate embodiment compared to Figure 11, this alternate embodiment have bigger inclined-plane area, because
And can provide it is higher face contrast, as shown in figure 14, wherein in Figure 14 expression this alternate embodiment optical diaphragm U
(indicating with solid line) and remove contrast of the present embodiment optical diaphragm U (being represented by dotted lines) of extinction part 3 at different perspectives θ
CR；Solid line peak value is 3160, indicates the contrast of facing of the optical diaphragm U of this alternate embodiment, and dashed peaks 3011 indicate
The optical diaphragm U removing extinction part 3 of this alternate embodiment faces contrast.
Please refer to Figure 15, in the present embodiment, extinction part 3 has a maximum gauge T.In the present embodiment, maximum gauge T refers to suction
Thickness of the light part 3 on the direction for being parallel to the second light-emitting surface 202.Maximum gauge T meets following relationship:
Please refer to Figure 15, in above formula, H be between the top 211 and the bottom 212 of the light guide 21 one away from
From n1For the first refractive index, n2For second refractive index, θ2It is a light from incident first optical waveguide layer of second optical waveguide layer 2
1 incident angle,For a tangent line C of the side and an angle of the bottom 212.In the present embodiment, above-mentioned tangent line C is edge
The tangent line of the side 213 of light guide 21, in other embodiments, when the side of light guide 21 213 is not plane, for example, one is convex
When curved surface or concave curved surface, with maximum incident angle θ2Incident extinction part 3 and the light for having unique intersection point with the side of light guide 21 213
L can be considered to overlap with above-mentioned tangent line C.
As shown in figure 15, clearly, maximum incident angle θ2Refer to it is incident from the bottom margin of extinction part 3 as light L and from
Project incident angle when extinction part 3 in 211 edge of top of light guide 21.When the thickness of extinction part 3 is close to above-mentioned relation formula
In maximum value, extinction part 3 can absorb it is all may generate the light of total reflection in light guide side, thus can reach optimal
The effect of contrast is faced in extinction effect and raising.It is understood that if the thickness of extinction part 3 surmounts above-mentioned maximum value, it will
Can the additional absorbent light that will not be totally reflected originally, in turn result in the penetrance decline of the first optical waveguide layer 1, and to facing pair
Promotion than degree has no help.
By above-mentioned technological means, the optical diaphragm U extinction part 3 of the present embodiment is absorbable from the incident light guide in side 213
21 light reduces the probability that light L is totally reflected in side 213, and that improves display module Z faces contrast.And this reality
It applies in example, the refractive index of extinction part 3 is equal to the refractive index of the first optical waveguide layer 1, squeezes into light guide 21 to avoid from the first optical waveguide layer 1
The light of side 213 is totally reflected.
Second embodiment
Please refer to Figure 16, the main difference of the present embodiment and previous embodiment is, the optical film that previous embodiment provides
Piece U has the first optical waveguide layer 1 and the second optical waveguide layer 2, and multiple light guides 21 are formed in the second light-emitting surface of the second optical waveguide layer 2
In 202；The optical diaphragm U ' of the present embodiment only includes an optical waveguide layer 1 ', and multiple light guides 21 ' are correspondingly formed in optical waveguide layer 1 '
Incidence surface 101 ' each accommodating recess portion 103 in.In the present embodiment, light guide 21 ' is equally recessed towards accommodating with side 213 '
The mode that the inner wall 1031 ' in portion 103 ', bottom 212 ' correspond to recess portion opening 1032 ' is set to accommodating recess portion 103 ', guide-lighting
Layer 1 ' has fourth refractive index n4, light guide 2 ' is with the 5th refractive index n5, fourth refractive index n4Greater than the 5th refractive index n5, and
The side 213 ' of the covering light guide 21 ' of extinction part 3 '.Such as first embodiment, the present embodiment can have extinction part 3 ' to extend side
213 ' and it is covered in the alternate embodiment of bonding pad 101a ', and the light guide 2 ' of the present embodiment also can be as tangible such as first embodiment
Variation on shape, the invention is not limited thereto.
In summary, optical diaphragm provided by the embodiment of the present invention (U, U ') and display module Z are by " each light guide
(21,21 ') are respectively arranged at each accommodating recess portion (103,103 ') ", " extinction part 3 ' is set to the side 213 ' of light guide 21 '
Between optical waveguide layer 1 ', and extinction part 3 ' covers side 213 ' " and " extinction part 3 is set to the side 213 and the of light guide 21
Between one optical waveguide layer 1, and extinction part 3 covers the technical solution of side 213 ", injects light guide (21,21 ') side to reduce light L
The probability being totally reflected when face (213,213 '), further promote display module Z faces contrast.
In addition, the embodiment of the present invention can be by the refractive index n for making extinction part 33With the refractive index n of the first optical waveguide layer 11Equal,
The refractive index n of extinction part 3 '6With the refractive index n of optical waveguide layer 1 '4It is equal, light L can be further reduced in the first optical waveguide layer 1 and suction
The interface and optical waveguide layer 1 ' and the interface of extinction part 3 ' of light part 3 are totally reflected, and further promote facing for display module Z
Contrast.Extinction part 3 can be further disposed between the bonding pad 101a on the first incidence surface 101 between two accommodating recess portions 103,
Or extinction part 3 ' can be further disposed at the bonding pad 101a ' on incidence surface 101 ' between two accommodating recess portions 103 ', with further
Improving optical diaphragm (U, U ') faces contrast.
Certainly, the present invention can also have other various embodiments, without deviating from the spirit and substance of the present invention, ripe
It knows those skilled in the art and makes various corresponding changes and modifications, but these corresponding changes and change in accordance with the present invention
Shape all should fall within the scope of protection of the appended claims of the present invention.
Claims (12)
1. a kind of optical diaphragm is used for a display module, which includes:
There is one optical waveguide layer an incidence surface, one in the light-emitting surface of the incidence surface and to be formed at least the one of the incidence surface opposite to each other
Accommodate recess portion, wherein there is the accommodating recess portion inner wall and a recess portion to be open；
An at least light guide, each light guide is respectively arranged at each accommodating recess portion, and each light guide has a top
Portion far from the bottom at the top of this and connects the one side at the top Yu the bottom, wherein the side direction of the light guide
The inner wall of the accommodating recess portion, the bottom of the light guide correspond to the recess portion opening of accommodating recess portion；And
An at least extinction part, at least an extinction part is set between the side and the optical waveguide layer of an at least light guide for this, and
The extinction part covers the side；
Wherein, which has a fourth refractive index, and each light guide has one the 5th refractive index, and the fourth refractive index is big
In the 5th refractive index.
2. optical diaphragm according to claim 1, which is characterized in that an at least extinction part has one the 6th refractive index,
6th refractive index is equal to the fourth refractive index.
3. optical diaphragm according to claim 1, which is characterized in that an at least extinction part has one the 6th refractive index,
6th refractive index is no more than the fourth refractive index and is not less than the 5th refractive index.
4. optical diaphragm according to claim 1, which is characterized in that the optical waveguide layer has at least two accommodating recess portions,
The incidence surface has an at least bonding pad, which is located between every two adjacent recess portion openings, wherein the extinction part
Further cover the bonding pad.
5. optical diaphragm according to claim 1, which is characterized in that an at least extinction part has a maximum gauge T, and
The maximum gauge meets following relationship:
Wherein, H is the distance between the top and the bottom of the light guide, n4For the fourth refractive index, nin is a light
With an incident angle θ in from before the incident optical waveguide layer of the incidence surface where medium refractive index,For a tangent line of the side
With an angle of the bottom.
6. a display module, characterized by comprising:
One display panel, the display panel have a display surface；And
Optical diaphragm as described in any one of claims 1 to 5 is set to the display surface of the display panel, wherein this enters
Smooth surface is towards the display surface.
7. a kind of optical diaphragm is used for a display module, which is characterized in that the optical diaphragm includes:
There is one first optical waveguide layer one first incidence surface, one in the first light-emitting surface of first incidence surface and to be formed in opposite to each other
At least one accommodating recess portion of first incidence surface, wherein there is the accommodating recess portion inner wall and a recess portion to be open；
One second optical waveguide layer is set to first incidence surface, second optical waveguide layer have one second incidence surface, one opposite to each other in this
Second light-emitting surface of two incidence surfaces and at least light guide for being formed in second light-emitting surface, each light guide are respectively set
In each accommodating recess portion, and each light guide have a top, far from the bottom at the top of this and connect the top and
The one side of the bottom, wherein the inner wall of the side of the light guide towards the accommodating recess portion, the bottom of the light guide
The recess portion corresponding to the accommodating recess portion is open；And
An at least extinction part, an at least extinction part be set at least light guide the side and first optical waveguide layer it
Between, and the extinction part covers the side；
Wherein, which has a first refractive index, which has one second refractive index, the first refractive
Rate is greater than second refractive index.
8. optical diaphragm according to claim 7, which is characterized in that an at least extinction part has a third reflect rate,
The third reflect rate is equal to the first refractive index.
9. optical diaphragm according to claim 7, which is characterized in that an at least extinction part has a third reflect rate,
The third reflect rate is no more than the first refractive index and is not less than second refractive index.
10. optical diaphragm according to claim 7, which is characterized in that first optical waveguide layer has at least two accommodatings
Recess portion, first incidence surface have an at least bonding pad, which is set between every two adjacent recess portion openings,
In, which further covers the bonding pad.
11. optical diaphragm according to claim 7, which is characterized in that an at least extinction part has a maximum gauge T,
And the maximum gauge meets following relationship:
Wherein, H is the distance between the top and the bottom of the light guide, n1For the first refractive index, n2For second folding
Penetrate rate, θ2It is a light from an incident angle of incident first optical waveguide layer of second optical waveguide layer,For a tangent line of the side
With an angle of the bottom.
12. a display module, characterized by comprising:
One display panel, the display panel have a display surface；And
Optical diaphragm as described in any one of claim 7 to 11 is set to the display surface of the display panel, wherein should
Second incidence surface is towards the display surface.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US201862614911P | 2018-01-08 | 2018-01-08 | |
| US62/614,911 | 2018-01-08 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109212825A true CN109212825A (en) | 2019-01-15 |
| CN109212825B CN109212825B (en) | 2021-07-20 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811326205.3A Active CN109212825B (en) | 2018-01-08 | 2018-11-08 | Optical film and display module |
| CN201811331920.6A Active CN109358447B (en) | 2018-01-08 | 2018-11-09 | Optical film and display device having the same |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201811331920.6A Active CN109358447B (en) | 2018-01-08 | 2018-11-09 | Optical film and display device having the same |
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| Country | Link |
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| CN (2) | CN109212825B (en) |
| TW (2) | TWI671546B (en) |
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| CN111796349A (en) * | 2020-07-02 | 2020-10-20 | Tcl华星光电技术有限公司 | Visual angle diffusion film and display panel |
| WO2022099622A1 (en) * | 2020-11-13 | 2022-05-19 | 深圳纳弘熠岦光学科技有限公司 | Display synergistic film and display device |
| TWI760118B (en) * | 2021-02-24 | 2022-04-01 | 友達光電股份有限公司 | Display device |
| CN113075814A (en) * | 2021-03-25 | 2021-07-06 | Tcl华星光电技术有限公司 | Visual angle diffusion film and display panel |
| CN113156695A (en) * | 2021-04-06 | 2021-07-23 | Tcl华星光电技术有限公司 | Visual angle diffusion film and display panel |
| US20220365341A1 (en) * | 2021-05-12 | 2022-11-17 | Cm Visual Technology Corporation | Optical film |
| TWI807368B (en) * | 2021-07-15 | 2023-07-01 | 友達光電股份有限公司 | Viewing angle compensation film and display device using the same |
| WO2023015470A1 (en) | 2021-08-11 | 2023-02-16 | 瑞仪光电(苏州)有限公司 | Optical film, backlight module, and display device |
| CN114023800A (en) * | 2021-11-02 | 2022-02-08 | 深圳市华星光电半导体显示技术有限公司 | Display panel and manufacturing method thereof |
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Also Published As
| Publication number | Publication date |
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| CN109358447B (en) | 2021-08-20 |
| TW201930925A (en) | 2019-08-01 |
| CN109358447A (en) | 2019-02-19 |
| TWI728252B (en) | 2021-05-21 |
| TW201930980A (en) | 2019-08-01 |
| CN109212825B (en) | 2021-07-20 |
| TWI671546B (en) | 2019-09-11 |
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